env GO111MODULE=on

# We should not create a go.mod file unless the user ran 'go mod init' explicitly.
# However, we should suggest 'go mod init' if we can find an alternate config file.
cd $WORK/test/x
! go list .
stderr 'found vendor/vendor.json in .*[/\\]test'
stderr '\s*cd \.\. && go mod init'

# The command we suggested should succeed.
cd ..
go mod init
go list -m
stdout '^m$'

-- $WORK/test/vendor/vendor.json --
{}
-- $WORK/test/x/x.go --
package x // import "m/x"
